[CentOS] figuring out LogVol details for mount

Hi,
I need to mount a LVM in rescue mode to create a new initrd image. I
am not sure how do I fond out which LogVol is to be mounted. How do I
find it out? In most of the configs I have used LogVol00 with ext3
filesystem which contains OS install. This particular system is not
installed by me and I am not sure how do I find it out. I did try 'lvm
lvs' command, but probably that's not the right command here. Any
help?
--
thanks,
neuby.r.